/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.jakewharton.rxbinding4.internal;

import io.reactivex.rxjava3.core.Observer;
import io.reactivex.rxjava3.disposables.Disposable;
import ohos.eventhandler.EventRunner;

public final class Preconditions {
    public static void checkNotNull(Object value, String message) {
        if (value == null) {
            throw new NullPointerException(message);
        }
    }

    public static boolean checkMainThread(Observer<?> observer) {
        if (EventRunner.current() != EventRunner.getMainEventRunner()) {
            observer.onSubscribe(Disposable.empty());
            observer.onError(
                    new IllegalStateException(
                            "Expected to be called on the main thread but was " + Thread.currentThread().getName()));
            return false;
        }
        return true;
    }

    private Preconditions() {
        throw new AssertionError("No instances.");
    }
}
